From the developer: "ZDelete purpose is to protect your privacy by preventing other people to access your private data after deletion. ZDelete is cleanup utility and eraser software that sweeps selected files, cookie files, folders, Internet Cache, Internet History, Internet Cookies, etc. without any possibility of the following data recovery. It allows you to use Internet without leaving any history or traces on your hard drive. Integrated Disk Wiper can also clear out all disk's free space so that recovery of files previously removed from the drive becomes impossible. ZDelete conforms to US Department of Defense clearing and sanitizing standard DoD 5220.22-M, you know that once your file was destroyed with this secure deletion utility, sensitive information is purged out forever. It is a powerful and flexible data shredder for the information that must be permanently rooted away from the hard drive. For safety's sake it also provides a preview of the cleanup."